During the 15 days from New Year's Eve to Lantern Festival, Beijing was affected by smog for more than half of the time, and people suffered a lot because of smog. On the road, people drive slowly because they can't see clearly. People also suffer from many diseases caused by smog.

The smog in Beijing is caused by many factors, among which the increase of cars in urban areas plays an important role. Cars emit a lot of toxic gases, which in turn aggravates the already serious air pollution.

In my opinion, the number of cars should be limited. We should call on people to use public transport more. Only in this way can we expect more sunny days.